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[42030] Artykuł: AN ANALYSIS OF THE MICROSTRUCTURE, MACROSTRUCTURE AND MICROHARDNESS OF NiCr-Ir JOINTS PRODUCED BY LASER WELDING WITH AND WITHOUT PREHEATCzasopismo: Archives of Metallurgy and Materials Tom: 61, Zeszyt: 2, Strony: 1157-1162ISSN: 2300-1909 Wydawca: POLSKA AKAD NAUK, POLISH ACAD SCIENCES, INST METALL & MATER SCI PAS, PL, 00-901 WARSZAWA, POLAND Opublikowano: Czerwiec 2016 Liczba arkuszy wydawniczych: 0.50 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Recenzowana publikacja w języku innym niż polski w zagranicznym czasopiśmie spoza listy Punkty MNiSW: 5 Klasyfikacja Web of Science: Article DOI Web of Science Keywords: microstructure  microhardness  microjoint  laser welding  refractory metals  |
This paper discusses some of the basic problems involved in laser welding of dissimilar materials with significant differences in melting points. It focuses on the micro and macrostructure of laser welded NiCr-Ir microjoints used in central spark plug electrodes. The joints were produced by welding with and without preheat using an Nd, YAG laser. The structure and composition of the welded joints were analyzed by means of a light microscope (LM) and a scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) spectrometer. The microhardness of the weld area was also studied.